LibTest/typed_data/Float32List/Float32List.view_A03_t01.dart

/*
 * Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion
 * Float32List.view(
 *     ByteBuffer buffer, [
 *     int byteOffset = 0, int length
 * ])
 * ...
 * If the length is not specified, it defaults to null, which indicates that
 * the view extends to the end of the byte buffer.
 * @description Checks that if the [length] is not specified, the view extends
 * to the end of the byte buffer.
 * @author msyabro
 */

import "dart:typed_data";
import "../../../Utils/expect.dart";

void check(List<double> array, int offset, int numberOfElements) {
  double lastElement = array.last;
  var tmp = new Float32List.fromList(array);
  var byteBuffer = tmp.buffer;
  var l = new Float32List.view(byteBuffer, offset);
  Expect.equals(numberOfElements, l.length);
  Expect.equals(lastElement, l[numberOfElements - 1]);
}

main() {
  check([
    0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0,
    13.0, 14.0, 15.0, 16.0, 17.0
  ], 0, 18);
  check([
    0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0,
    13.0, 14.0, 15.0, 16.0, 17.0
  ], 4, 17);
  check([
    0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0,
    13.0, 14.0, 15.0, 16.0, 17.0
  ], 68, 1);
}